Flashcards in Introduction to Worms Deck (14):
What type of worm is the Acanthocephala?
Thorny headed worm
What are the characterstics of the Acanthocephala?
Worms with no digestive system, not fluke/tapeworm/nematode. They have a proboscis that is armed and embeds in SI wall.
What kind of worm is Macracanthorhynchus hirudinacus?
Large thorny headed worm
What are the DH/IH of Macracanthorhynchus hirudinacus?
How large are the M. hirudinacus? What do they look like?
Up to 35 cm, proboscis armed with 5-6 rows of hooks
What is the life cycle of M. hirudinacus?
What are the clinical signs of M. hirudinacus?
How does one diagnose M. hirudinacus?
Egg on fecal exam
How can one control/treat M. hirudinacus?
Sanitation, loperamide or ivermectin are not approved but can be used
What is the common name of the Platyhelminthes?
What are the characteristics of Platyhelminthes?
Bilaterally symmetrical, dorsoventrally flattened, anterior end has sensory/motor nerves, no body cavity, tegument (living surface for air diffusion), flame cells, highly branched gut
How do Platyhelminthes reproduce?
Hermaphrodites, self and cross fertilization, sexual reproduction in DH, asexual reproduction in IH
What is the typical life cycle of a fluke?
DH (deer) sheds eggs in feces, mirecidium hatches, infects snail (specific species), sheds cecaria, encyst on grass as metacecaria, has to be ingested by DH (or cattle, sheep, other accidental hosts)